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Poster communications

Physics with LHCb calorimeter

Abstract : The start-up of LHC is approaching, the first physics events are expected in 2008. For the LHCb, the experiment dedicated to the precision studies of CP violation and other rare phenomena in b hadron decays, as well as charm, tau physics the commissioning of the detector is ongoing. The first year of the LHCb operation will be extremely important not only since the principle of experiment functioning should be proven, but also to calibrate the detectors, to establish proper trigger operation and DAQ. And, most important, to demonstrate the physics capabilities of the LHCb. The calorimeter is an essential ingredient of the LHCb detector, playing important role for the trigger, and reconstruction of channels with neutrals. It comprises the scintillating pad detector, preshower, electromagnetic Shashlyk type and hadronic tile calorimeters, with all the four detectors following the general principle of collecting the light from scintillator tiles with wave-length shifting fibers. The poster addresses the calorimeter design, the detectors performance studies with the test beam and cosmic rays. We also mention the principle of calorimeter calibration. The calorimeter proves to be an efficient device to identify electrons and combined particle ID is constructed. Particularly important is photon and pi0 reconstruction. To reconstruct pi0 shower shape analysis is required for transverse momenta where calorimeter granularity does not provide sufficient gamma/pi0 separation. Important physics cases are radiative b-decays, b->V gamma, which give access to New Physics search in penguin loops, and B->rho pi decays, which provide a measurement of the sum of the two angles, beta and gamma, of the Unitarity triangle. Reconstruction of neutrals is also essential for decays with eta or eta_prime, which contribute e.g. to the phi_s angle measurement via Bs->J/Psi eta mode.
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Poster communications
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http://hal.in2p3.fr/in2p3-00171133
Contributor : Sabine Starita <>
Submitted on : Tuesday, September 11, 2007 - 4:30:37 PM
Last modification on : Wednesday, September 16, 2020 - 4:23:14 PM

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  • HAL Id : in2p3-00171133, version 1

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LAL | CNRS | IN2P3

Citation

S. Barsuk. Physics with LHCb calorimeter. XXIII International Symposium on Lepton and Photon Interactions at High Energy, Lepton-Photon 2007 (LP07), Aug 2007, Daegu, South Korea. ⟨in2p3-00171133⟩

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